Rapid Prototyping of Pyramidal Structured Absorbers for Ultrasound
作者: Fabián AcquaticciMaximiliano M. YommiSergio N. GwircSergio E. Lew
作者单位: 1Instituto de Ingeniería Biomédica, Universidad de Buenos Aires, Buenos Aires, Argentina
2Laboratorio de Transductores Piezoeléctricos, Instituto Nacional de Tecnología Industrial, Buenos Aires, Argentina
刊名: Open Journal of Acoustics, 2017, Vol.07 (03), pp.83-93
来源数据库: Scientific Research Publishing Journal
DOI: 10.4236/oja.2017.73008
原始语种摘要: Acoustic measurements or ultrasonic testing can be strongly affected by reflections or echoes from test tank walls. In order to create a non-reflecting environment equivalent to infinite medium, a pyramidal structured absorber (PSA) can be used to coat the walls of an ultrasonic tank. In this work, we model an array of tetragonal pyramid ultrasonic wave absorbers. This model is based on two coupled first-order equations describing the stress and particle velocity within an isotropic medium. For absorbing media, the Kelvin-Voigt model of viscoelasticity is used. The equations are discretized in 2D using an efficient time-stepping pseudo-spectral scheme that takes in consideration both, the acoustic properties and attenuation characteristics of the composite materials. We then built a 3D...
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  • pyramid 角锥体
  • covering 覆盖物
  • Rapid 拉皮德牌照相机
  • height 高度
  • ultrasonic 超音波的
  • flexible 接电绳
  • modeling 制祝型
  • efficient 有用的
  • pseudo 
  • printing 印刷